Submicron CoSb2O6 wires were prepared by a non-aqueous colloidal method, using cobalt nitrate, antimony trichloride, dibutylamine and ethyl alcohol. Microwave radiation was used for solvent evaporation, producing a solid precursor material. X-ray powder diffraction,
performed on calcined samples, revealed that single-phase CoSb2O6 was produced at 500 °C. CoSb2O6 wires, with length between 4 and 17 μm were observed by scanning electron microscopy (SEM). The observation by transmission electron microscopy
(TEM) revealed that the surface of CoSb2O6 wires was covered by sharp and rounded points. By this technique, an average diameter of 170 nm was measured. CO2 and CO gas sensing characterization was performed on thick films made with the as-prepared CoSb2O6
powder. The electrical measurements were performed in alternating current (AC), at 200 and 300 °C. At 200 °C, a significant variation of the magnitude of the impedance (|Z|) was registered in both gases. However, the best results were obtained at 300 °C, using a frequency
of 100 kHz. The analysis of the results indicated that the gas sensing performance was better in carbon monoxide.
The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.